Posted in 2023
Changes in pyslk 1.9
- 25 August 2023
updated: 2023-08-29
We will update this blog post another time later this week (CW35).
Changelog slk_helpers v1.9.5
- 14 July 2023
Update from slk_helpers v1.9.3 to v1.9.5
see here for changes from slk_helpers v1.9.0 to v1.9.3
Changelog slk_helpers v1.9.3
- 06 July 2023
Update from slk_helpers v1.9.0 to v1.9.3
see here for changes from slk_helpers v1.8.10 to v1.9.0
Changelog slk_helpers v1.9.0
- 22 May 2023
Update from slk_helpers v1.8.10 to v1.9.0
see here for changes from slk_helpers v1.8.2 to v1.8.10
Important news for slk usage
- 08 May 2023
Please do not retrieve files from more than 10 tapes with one call of slk retrieve / recall. Using more tapes in one call of slk retrieve might slow down the whole StrongLink System considerably.
First, count the number of tapes as follows:
Changelog slk_helpers v1.8.10
- 08 May 2023
Update from slk_helpers v1.8.2 to v1.8.10
see here for changes from slk_helpers v1.7.4 to v1.8.2
Changelog slk_helpers v1.8.7
- 24 April 2023
Update from slk_helpers v1.8.2 to v1.8.7
see here for changes from slk_helpers v1.7.4 to v1.7.4
OpenSSH Certificate Authentication
- 11 April 2023
It is very convenient to allocate part of a node ore even a full node for interactive work on Levante. We describe how to do this in our main documentation.
If you always use a login node of Levante to log into the allocated node, then you won’t have any problems with host keys. However, if you use a login node as a jump host for loging into the allocated node from your local machine, then you may see a warning.
Changelog slk_helpers v1.8.2
- 21 March 2023
Update from slk_helpers v1.7.4 to v1.8.2
see here for changes from slk_helpers v1.7.1 to v1.7.4
Set up Remote Developement/Debugging
- 24 February 2023
Some workarounds related to remote development/debugging on Levante. These workarounds are not tested on all available remote tools but often specific to a certain IDE. We encourage you to test on your favorite IDE and report issues to support@dkrz.de.
Tested on VSCode
Changelog slk_helpers v1.7.4
- 10 February 2023
Update from slk_helpers v1.7.1 to v1.7.4
see here for changes from slk_helpers v1.6.0 to v1.7.1
Changelog slk v3.3.83
- 31 January 2023
Changes from slk v3.3.81 to v3.3.83
see here for changes from slk v3.3.76 to v3.3.81
E-Mail notification when login token due to expire
- 24 January 2023
As suggested by the DKRZ-Usergroup there is now the possibility to remind users when their token is due to expire. We provide a SLURM script for this purpose. The 30-day validity of the login token remains unchanged. Details are given in Reminder login token expires.
How can I log into levante, change my password and login shell?
- 24 January 2023
To access Levante login nodes via ssh with X11 forwarding, use:
For macOS we recommend to use -Y instead of the -X option.
I want to add my own packages to Python or R but they won’t compile
- 24 January 2023
Python and R, among other scripting languages, allow users to create customized environments including their own set of packages.
For Python you use virtualenv or conda, R can also add locally installed packages.
Which Compiler and MPI library should I use?
- 24 January 2023
For model simulations in production mode we recommend to use Intel compilers and Open MPI:
Do not forget to consult the recommended environment settings and adjust your run script accordingly. Without these settings applications can run unexpectedly slowly.
How do I log into the same login node I used before
- 24 January 2023
levante.dkrz.de maps to a whole group of nodes to distribute the load:
All login nodes share the same file system so most of the time you do
not have to care which node you are on. However, there are reasons why
you may want to connect to a specific node (for example, to reattach
to a running tmux session). You first have to find out
on which node you are. This may be indicated in your prompt or you can
also use hostname for this purpose:
Changelog slk_helpers v1.7.1
- 16 January 2023
Please use slk_helpers version 1.7.2 (module load slk_helpers/1.7.2) instead of 1.7.1 because one minor issue was fixed in 1.7.2 (detailed changelog). There will be no extra blog entry for slk_helpers 1.7.2.
Update from slk_helpers v1.6.0 to v1.7.1
Changelog slk v3.3.81
- 16 January 2023
Changes from slk v3.3.76 to v3.3.81
slk retrieve and slk recall print the id of the StrongLink-internal tape-recall job